Assessment of the Association of Vitamin D and the Risk of Tuberculosis among End-Stage Kidney Disease Population.

We investigated the role of vitamin D in the risk of tuberculosis (TB) among patients with end-stage kidney disease (ESKD). The retrospective cohort was conducted with data of 20,985 patients with kidney disease and 20,985 controls without kidney disease (1:1 matching on age of cohort entry and sex) in the duration of 1997-2010 from the Taiwan National Health insurance database. Then, by a case-cohort study, among 20,985 kidney disease, 3194 ESKD patients were identified with matched 3194 non-ESKD patients. Multivariate analyses revealed a significant association between kidney disease and tuberculosis (adjusted incidence rate ratio (IRR) 1.57 (1.33-1.86)), and the risk increased after 3 years of follow-up the (adjusted IRR 3.79 (2.55-5.62)), but after more years of follow-up no significance was observed. We also found that ESKD increases the risk of tuberculosis (adjusted IRR 3.67 (2.27-5.93)). However, vitamin D usage was not related with the tuberculosis risk in ESKD patients ( p > 0.1783). Our study showed increased risk of tuberculosis in kidney disease and ESKD patients, and vitamin D was not beneficial in ESKD.